The Check Engine light is constantly On. I went to Auto Zone and asked them to read what's wrong with it. So they found these codes there: P0341, P0342, P0443, P0449, P0300, P0141, and P0135. I bought this car for my mother-in-law and she was driving it as it is, because it's going fine, just sometimes it's jerking on idle or when you drive. But it seems I will not be able to sell this car now, since my mother-in-law moved back to her place. Can you please give me an advise what I need to do with this Errors? Do I need to buy a new computer? Most of these errors have common probable cause: Poor electrical connection, but I don't know what connection is poor. Also as soon as I start to drive this car the sign of a drive wheel with exclamation mark comes On on the dash board. Does that realted to these problems also? Help me please.

Thank you.